Smoke-consuming furnace



(No Model.) 4 2 sheets-sheet 1. J. G.- CULBERTSON 83 W. `A. EUDALY.

SMOKE GONSUMING FURNACE.

No. 260, 1'70. Patented June 27, 1 882? 2 Sheets-Sheet 2.- J. C. CULBERTSON &7 W. A. EUDALY.

SMOKE 'UONSUMINGXEUINAVCEQM I No. 260,170. A 'Patented June 27, 1882.

(No Model.)

UNITED STATES PATENT FFICE.

JAMES C. CULBERTSON AND WILLIAM A. EUDALY, OF CINCINNATI, OHIO.

SMOKE-CONSUMING FURNACE.

SPECIFICATION formng partof Letters Patent No. 260,'170, dated June 27, 1882. Application filed May 24, 1832. (No'modeL) Io all 'whom it may coicem:

Be it known that we, JAMES G. CULBERT- soN and WILLIAM A. EUDALY,both of Cincinnati, County of Hamilton, and State of Ohio,

i First. In providing the sides of the furnace with vertical narrow elongated apertures for V the introduction of external air, said apertures being adapted to be controlled in such manner that any required quantity of air directly from the outside can be introduced at any stage of combustion.

Second. In the conbination and arrangement of the furnace in such manner that the escaping products of combustion from the fire-box.

into a rear or adjoining combustion-chambcr are made to pass through a vertical elongated fiue or throat, said flue having flaring ends enlargin g from its center toward eachend, and in cross-sections rescmbling the segment of a circle. By this means it forms a centrallycontracted throat, by which the gases and other combustibles are made to focalize and compress while passing through said centrallycontracted flue, thus compelling them 'to become more intimately mixed, and will, when released, flash violently into the rear expansion-chamber in diagonal or cross directions.

Third. It further consists in the means of supplying atmospheric air at such points relative to the centrally-contracted flaring-ended again partially arrested in their course by the end-wall cavities, in which they are made to eddy, and by which process the air entering from the sides is thoroughly mixed with the gases within, which prepares them for conplete conbustion in' the eXpansion-chamber.

Fifth. This invention further consists in providing the rear end walls of the firebox with an elongated vertical flue centrally contracted and flaring at its ends, and opening into an expanded flue or chamber, the said contracted lue having curved winged wall deflectors, whereby the products of combustion are deflected in opposite directions from said winged walls for the more t-horough commingling ot' the air and gases in the expansion chamber or flue, as described.

Sixth. It consists, further, in conbination with a 'furnace such as described, of the centrally-contracted lue and the curved winged walls projecting rearwardly from said fine in such manner as to form behind said winged walls an air-space communicating with the outer air, whereby said winged walls serve the double purpose of deflecting the heated gases from one side or sides and the air from the other side or sides of said winged walls in such a direction asto come in contact with each other. I p

Seventh. This invention further consists in the combination and arrangement of a series of dampers secured to the outsides of the furnace-walls, and with thenarrow elongatcd vertioal air-ducts located in said walls, and with the rear air-duets located in the rear of the contracted fine, whereby the required qnantity of air is controlled to suit the conditions of the fuel while in a state of conbustion, as will more fully hereinafter appear.

Figure l represents a pcrspective View of the interier of 'our furnace, constructed in ac cordance with our invention, the front and one side of the furnace being removed, also that part of the boiler immediately over the fire-box. Fig. 2 represents a transverse section of the fire-box, drawn through at the line a' a' of Fig. 3, showing the fire-box both with and without concave side walls. Fig. 3 represents a horizontal longitudinal section drawn in the same plane with the upper edge of the grate-bars, showing the bottoms of the centrally con- IOO.

tracted and expanded flues and the curved winged walls, together with the positions of the influent air-ducts. Fig. 4 represents an exterior broken section of one side of the fire-box, showing the manner of applying the series of dampers. Fig. 5 represents an interior vertical section of the expanded fiue at the base, through which the influentair-ducts s' s' pass.

In said drawings, S represents the boilcr. B represents the brick-work. F F represent the front of the furnace. d d represent the front doors. Arepresents the ash-pit. f represents the fire-box. G represents the gratebars. D D' represent the series of dampers. 'v v represent the coneaved rear end walls. p representsa fire-box withconcave side walls. p' represents a fire-box with partially-concaved side walls. M represents centrally-contracted flue. E E represent the winged walls. Grep- Iesents the expanded flue. s s represent the vertical influent air-ducts in the sides of the fire box. s's' represent theinfluent air-ducts in the base of the expanded fine.

It is found that the pointof combnstion varies from the grate-bars upward in proportion to the amount of fuel and heated gases in the fire-box. Consequently these narrow vertical air-ducts are provided with a series of dampers, D D', so that by adding a number of these rows ot' dampers air can be admitted at any point desired. It is also found that the amount of atmospheric air admitted should always be in proportion to the amount of conbustible materials in the fire-box, which is also controlled by the same series ot' dampers. We claim that by long narrow vertical airdncts s s', in combination with the series of danpers D D', we are enabled to adnit currents of air in thin sheets or waves, which, on account of their vertical position, must necessarily come in contact with the inflaned carbon and gases, and being admitted in thin sheets or waves, they become instantly heated without materially reducing the temperature in the fire-box. The concave side walls of the fire-box are segments of a circle the center of which is Situated in a line drawn directly under and against the bottom of the boiler, the radus of which should be at least equal to two-thirds the length of the diameter of the boiler.

The concave rear end walls, e e, of the firebox should be constructed with like proportions as the eoncave side walls. By the aid of the concave rear end walls, e v, and concave side walls, p 1)', the currents of commingled air and gases are defieeted toward the center ot' the fire-box, where, by means of the laterally and centrally contraeted flue M, the sides of the fiane are brought in close contact with each other, which greatly increases the temperature without lessening the draft.

We are aware that hot air and steam have been heretofore introduced through openings situated in various parts of the furnace by means of hollow walls, pipes, and other devices;

but we are not aware that atmospheric air has ever been admitted directly through long narrow Vertical influent air-ducts Situated in the sides ot' the furnace and conmunicating directly with the external surface.

The operation is as follows: The entire front ot' the furnace and openings to the ash-pit being closed, the vertical influent air-ducts should afford the only means for the introduction of air, the Volume of which is governed by a series of dampers, D D'. The ducts s s being situated i the opposite sides of the fire-box, and being the only influent air-channels, currents of air passing through them from the opposite sides, and

aided hy the concave rear end wallsm i), and l coneave side walls, p p, and centrally-contracted flue M, are caused to meet and comminglc in the center of the fire-chamber, thus afi'ording the necessary supply ot' oxygen, which, in combination with the inflamed carbon and other gases, is caused to pass along between the opposing side currents toward and through the centrally-contracted flue M into the expanded flue G, where said currents receive an additional supply of oxygen admitted through the direct influent air-ducts s' s', Situated in the sides of the base of the expanded flue C and in the rear ot' the winged walls E E, along which course complete combustion *takes place.

Having thus described our invention, and the best means at present known to us for carrying the same into eft'eet, we do not desire to be confined to the exact Construction and arrangement shown, as many modifications may be made of the same, within wide limits, without departing fron the spirit of our invention.

What we claim as our invention, and dcsire to secure by Letters Patent, is-

1. In a smoke-furnace, long narrow vertical influent air ducts s s, situated in the side walls ot' the fire-box, the air passing through said ducts regulated by a series of danpers, D D', substantially as and for the purposes specified.

2. In a smoke-consuming furnace, long narrow vertical influent airducts s s, Situated in the sides ot' the fire-box, in combination with a series of dam pers, D D', by means ot' which theinflow of air is regulated at different heights with relation to the fire-bed, substantiall y as and for the purposes specified.

3. In a smoke-consuming furnace, long narrow vertical influent air-ducts s s, situated in the sides of the fire-box,and the series ot'dampers D D', in combination with the rear end walls of the fire-box, substantially as and-of the purposes specified.

4. In a smoke-consuming furnace, long narrow vertical influent air-ducts s s, situated in the sides of the fire-box, and the series of dampers D D', in combination with the concave side walls, p 1)', of the fire-box, substantially as and for the purposes specified.

5. In a smoke-consuming furnace, long narrow vertical influent air-ducts s s, Situated iu ICO IIO

ITS

the sides of the fire-box, the series of dampers I of dampers D D', the concaved rear end walls,

D D', and the concave rear end wallsm v, of the fire-box,in combinatiou with the Iaterally-con- `-tracted flue, substantially as and for the purposes specified.

6. In a smoke-consuming fu'rnace, long narrow vertical infiowng air-ducts s s, Situated in the sides of -the fire-box, the series of dampers D D't, and. the concave side walls of the fire-box, in combination with the laterally-contracted flue, substantially as and for the purposes specified.

7. The comhination, in a smoke-consuming furnace, of the long narrow vertical influent air-ducts s s, Situated in the side walls of the fire-box, the series of dampersD D', and the concave rear end and side walls of the fire-box,

with the laterally-contracted flue extending to and within the expanded flue 0, substantially as and for the purposes specified.

S. The combinaton, in a smoke-consuming furnace, of the long na-rrow vertical influent air-ducts s s, situated in the side walls of 'the fire-box, the series of dampers D D', and the coucave side walls of the fire-box, with thelaterally-contracted flue and the winged walls, substantially as 'and for the purposes specified.

9. In a snoke-consuming furnace, the long narrow vertical influent air-ducts s s, the series 'v '0, and the concave side walls, p p; of the firebox, and thelaterally-contraoted flue M, in com'- bination with the expauded flue or chanber C, together with vertical influent air-ducts s' s', substantially as and for the purposes set forth.

10. In a smoke-consuming furnace having a primary combustion-chamber, a rear combustion chamber or flue, and a dividing-wall provided with a vertical elon'gated flue centrally contracted, in combination with winged walls arran ged substantially as and for the purposes set forth.

11. In a smoke-consuming furnace having a front and rear combustion chambe' or flue, a dividing-wall provided with a vertical elongated flue centrali; contracted and flaring at both ends, the winged curved walls, and the rear air-ducts communicating with said rear flue, Operating together substantially as and for the purposes meutioned In testimony whereof we affix our signatures in presence of two witnesses.

JAMES C. CULBERTSON. WILLIAM A. EUDALY.

Witnesses:

LoUIs F. ROETTGHER, -HENRY HEYL, Jr. 

